US9321323B2 - Adjustable wheel suspension for the wheels of an axle of a motor vehicle - Google Patents

Adjustable wheel suspension for the wheels of an axle of a motor vehicle Download PDF

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Publication number
US9321323B2
US9321323B2 US14/407,815 US201314407815A US9321323B2 US 9321323 B2 US9321323 B2 US 9321323B2 US 201314407815 A US201314407815 A US 201314407815A US 9321323 B2 US9321323 B2 US 9321323B2
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United States
Prior art keywords
wheels
housing
auxiliary frame
motor vehicle
wheel suspension
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US14/407,815
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US20150165862A1 (en
Inventor
Andreas Schindler
Heinrich Beringer
Ruben Goldberg
Christian Isakiewitsch
Joachim Schmitt
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Audi AG
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Audi AG
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Assigned to AUDI AG reassignment AUDI AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BERINGER, HEINRICH, GOLDBERG, Ruben, ISAKIEWITSCH, Christian, SCHIINDLER, ANDREAS, SCHMITT, JOACHIM
Publication of US20150165862A1 publication Critical patent/US20150165862A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/055—Stabiliser bars
    • B60G21/0551—Mounting means therefor
    • B60G21/0553—Mounting means therefor adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/025—Spring characteristics, e.g. mechanical springs and mechanical adjusting means the mechanical spring being a torsion spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/055—Stabiliser bars
    • B60G21/0551—Mounting means therefor
    • B60G21/0553—Mounting means therefor adjustable
    • B60G21/0555—Mounting means therefor adjustable including an actuator inducing vehicle roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/13—Torsion spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/60—Subframe construction

Definitions

  • the invention relates to an adjustable wheel suspension for the wheels of an axle of a motor vehicle.
  • So-called active systems for steadying the body of a motor vehicle are amply known.
  • setting devices are usually used for rotating a torsion bar. Applying a torque on the torsion bar generates active forces, which can influence the rolling movement or the movement of the body of the motor vehicle.
  • DE 101 26 928 A1 discloses corresponding arrangements for two-part stabilizers with a setting device for influencing the spring rates and the driving characteristics of motor vehicles.
  • the rolling behavior or the incline of the motor vehicle in curves can be reduced by adjusting the divided torsion bars of the overall u-shaped stabilizers in opposite directions or the pitch movement for example during braking can be counteracted by adjustment in the same direction.
  • each wheel of the axle is supported on a auxiliary frame via multiple wheel-guiding elements and is operatively connected with an adjustable torsion bar via its wheel-guiding elements.
  • Each torsion bar is assigned an setting device via which torques can be applied on the torsion bar for example in order to counteract a rolling movement.
  • corresponding control devices are provided for open loop or closed loop control of the setting device.
  • the components control device, setting device and torsion bar are each respectively fastened on the auxiliary frame.
  • a disadvantage is here that due to the direct fastening of the components controller, setting device and torsion bars on the auxiliary frame, the auxiliary frame has to be correspondingly reinforced and with this has to be constructed larger in the region of the fastening site in order to ensure absorption of the acting forces and torques. Besides a greater weight this also increases production costs.
  • a generic adjustable wheel suspension for the wheels of an axle of a motor vehicle which includes all features of patent claim 1 , is disclosed in the after published patent application DE 10 2011 018 574 A1.
  • the invention is based on the object to further improve an adjustable wheel suspension of the wheels of an axle of a motor vehicle according to the type set forth in the preamble of the independent claim so that the auxiliary frame has a smaller weight and can be produced more cost-effectively.
  • an adjustable wheel suspension for the wheels of an axle of a motor vehicle, in which each wheel is guided via wheel guiding elements and each wheel is operatively connected via its wheel guiding elements with a torsion rod which can be adjusted via an setting device, wherein the torsion rods are arranged so as to be partially aligned with each other and are oriented in transverse direction of the vehicle and are each supported on a auxiliary frame via their assigned setting device, wherein the two setting devices are connected with each other via a housing crossmember, wherein the housing crossmember is configured and dimensioned so that the auxiliary frame can be constructed without a transverse member.
  • each wheel of the adjustable wheel suspension is guided via multiple wheel-guiding elements and each wheel of the axle is operatively connected with an adjustable torsion bar.
  • the torsion bars assigned to the respective wheels are arranged so as to be partially aligned and are oriented in transverse direction of the vehicle.
  • each torsion bar is assigned a setting device.
  • the torsion bars are fastened on a vehicle-body-fixed auxiliary frame via the respective setting device.
  • the two setting devices or the housings of the setting devices are connected to each other via a housing crossmember.
  • the housing crossmember absorbs the acting forces and bending moments. This has the effect that smaller forces or torques have to be transmitted via the interface setting device-auxiliary frame.
  • auxiliary frame can be configured lighter in these regions, which in turn enables a more cost-effective production.
  • transverse supporting effect of the housing crossmember allows to omit a connection point compared to the otherwise conventional 3-point support compared to the state of the art.
  • the housing crossmember which is oriented in transverse direction of the vehicle, is dimensioned so that the auxiliary frame can be constructed without a transverse member.
  • the configuration and dimensioning according to the invention ensures that the housing crossmember additionally takes over the function of a transverse member of the auxiliary frame. Because now the auxiliary frame can be constructed without the font transverse member viewed in vehicle longitudinal direction, the auxiliary frame can be constructed significantly lighter.
  • the housing crossmember is configured as a closed profile.
  • the configuration of the housing crossmember as closed profile is particularly advantageous because this construction enables high stiffness, in particular bending stiffness, at low expenditure of material. Forces resulting from the setting process are directly transmitted into the structure without greater leverage effects.
  • the housing crossmember which is constructed as a closed profile, takes over protective functions for torsion bars and setting device.
  • the closed profile has a circular, rectangular or triangular cross section.
  • multiple moldings each having a horizontally oriented bore, are formed on the housing beam.
  • the auxiliary frame is provided with correspondingly oriented horizontally oriented bores so that the housing beam can be fastened via a horizontally oriented threaded connection on the auxiliary frame.
  • the horizontal threaded connection is particularly advantageous with regard to the smaller required mounting space.
  • FIG. 2 an adjustable wheel suspension constructed according to the invention.
  • FIG. 1 shows an adjustable wheel suspension overall designated with the reference numeral 10 for the wheels 12 , 14 of an axle of a motor vehicle.
  • each wheel 12 , 14 is operatively connected to a torsion rod 20 , 22 via a wheel guiding element 16 , 18 .
  • wheel guiding elements are not shown for reasons of clarity, the two torsion rods 20 , 22 are oriented in transverse direction FQ of the vehicle so as to be partially aligned with each other.
  • Each torsion rod 16 , 18 is assigned a setting device 24 , 26 .
  • the torques required for the adjustment of the torsion rods 16 , 18 are provided by the setting device 24 or 26 .
  • the setting devices 24 , 26 are directly fastened on an auxiliary frame 28 , here only shown schematically.
  • the auxiliary frame 28 In order to be able to absorb the occurring forces and torques, the auxiliary frame 28 has to be reinforced in this region. This increases weight and costs.
  • a housing crossmember 30 is arranged in the wheel suspension 10 according to the invention between the setting devices 24 , 26 .
  • the housing crossmember 30 connects the housing of the setting devices 24 , 26 .
  • the housing crossmember 30 absorbs the acting forces and torques, i.e., the forces and torques acting on the interface setting device 24 or 26 and auxiliary frame 28 are strongly reduced.
  • the aligned regions of the torsion rods 20 , 22 and with this also the housing beam 30 are oriented in transverse direction FQ of the vehicle.
  • the housing beam 30 is configured and dimensioned so that the housing beam 30 additionally takes over the function of a normally required auxiliary frame transverse member.
  • the auxiliary frame 28 is constructed without a front auxiliary frame transverse member, which leads to a further weight reduction.

Abstract

An adjustable wheel suspension for the wheels of an axle of a motor vehicle is disclosed, wherein each wheel is guided by means of wheel guide elements and each wheel is operatively connected to a torsion bar, which can be adjusted by means of an adjusting device, via its wheel guide elements, the torsion bars being partially aligned with each other and each torsion bar being mounted on an auxiliary frame by its associated adjusting device. The two adjusting devices are connected to one another via a crossmember of the housing.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS
This application is the U.S. National Stage of International Application No. PCT/EP2013/001533, filed May 24, 2013, which designated the United States and has been published as International Publication No. WO 2013/185879 and which claims the priority of German Patent Application, Serial No. 10 2012 011 918.6, filed Jun. 15, 2012, pursuant to 35 U.S.C. 119(a)-(d).
BACKGROUND OF THE INVENTION
The invention relates to an adjustable wheel suspension for the wheels of an axle of a motor vehicle.
So-called active systems for steadying the body of a motor vehicle are amply known. For this purpose setting devices are usually used for rotating a torsion bar. Applying a torque on the torsion bar generates active forces, which can influence the rolling movement or the movement of the body of the motor vehicle.
Thus, for example DE 101 26 928 A1, DE 10 2004 002 550 A1 or DE 102 42 552 B4 discloses corresponding arrangements for two-part stabilizers with a setting device for influencing the spring rates and the driving characteristics of motor vehicles. Hereby the rolling behavior or the incline of the motor vehicle in curves can be reduced by adjusting the divided torsion bars of the overall u-shaped stabilizers in opposite directions or the pitch movement for example during braking can be counteracted by adjustment in the same direction.
An adjustable wheel suspension of the generic type for the wheels of a motor vehicle is described in DE 10 2009 005 898 A1. Here each wheel of the axle is supported on a auxiliary frame via multiple wheel-guiding elements and is operatively connected with an adjustable torsion bar via its wheel-guiding elements. Each torsion bar is assigned an setting device via which torques can be applied on the torsion bar for example in order to counteract a rolling movement. For this purpose corresponding control devices are provided for open loop or closed loop control of the setting device. The components control device, setting device and torsion bar are each respectively fastened on the auxiliary frame. A disadvantage is here that due to the direct fastening of the components controller, setting device and torsion bars on the auxiliary frame, the auxiliary frame has to be correspondingly reinforced and with this has to be constructed larger in the region of the fastening site in order to ensure absorption of the acting forces and torques. Besides a greater weight this also increases production costs.
A generic adjustable wheel suspension for the wheels of an axle of a motor vehicle, which includes all features of patent claim 1, is disclosed in the after published patent application DE 10 2011 018 574 A1.
SUMMARY OF THE INVENTION
The invention is based on the object to further improve an adjustable wheel suspension of the wheels of an axle of a motor vehicle according to the type set forth in the preamble of the independent claim so that the auxiliary frame has a smaller weight and can be produced more cost-effectively.
This object is solved by an adjustable wheel suspension for the wheels of an axle of a motor vehicle, in which each wheel is guided via wheel guiding elements and each wheel is operatively connected via its wheel guiding elements with a torsion rod which can be adjusted via an setting device, wherein the torsion rods are arranged so as to be partially aligned with each other and are oriented in transverse direction of the vehicle and are each supported on a auxiliary frame via their assigned setting device, wherein the two setting devices are connected with each other via a housing crossmember, wherein the housing crossmember is configured and dimensioned so that the auxiliary frame can be constructed without a transverse member.
The dependent claims form advantageous refinements of the invention.
As is known, each wheel of the adjustable wheel suspension is guided via multiple wheel-guiding elements and each wheel of the axle is operatively connected with an adjustable torsion bar. In addition the torsion bars assigned to the respective wheels are arranged so as to be partially aligned and are oriented in transverse direction of the vehicle. For adjusting the torsion bar each torsion bar is assigned a setting device. The torsion bars are fastened on a vehicle-body-fixed auxiliary frame via the respective setting device. In addition the two setting devices or the housings of the setting devices are connected to each other via a housing crossmember. The housing crossmember absorbs the acting forces and bending moments. This has the effect that smaller forces or torques have to be transmitted via the interface setting device-auxiliary frame. This means that the auxiliary frame can be configured lighter in these regions, which in turn enables a more cost-effective production. In addition the transverse supporting effect of the housing crossmember allows to omit a connection point compared to the otherwise conventional 3-point support compared to the state of the art.
According to the invention the housing crossmember, which is oriented in transverse direction of the vehicle, is dimensioned so that the auxiliary frame can be constructed without a transverse member. The configuration and dimensioning according to the invention ensures that the housing crossmember additionally takes over the function of a transverse member of the auxiliary frame. Because now the auxiliary frame can be constructed without the font transverse member viewed in vehicle longitudinal direction, the auxiliary frame can be constructed significantly lighter.
According to a particularly advantageous embodiment of the invention, the housing crossmember is configured as a closed profile. The configuration of the housing crossmember as closed profile is particularly advantageous because this construction enables high stiffness, in particular bending stiffness, at low expenditure of material. Forces resulting from the setting process are directly transmitted into the structure without greater leverage effects. In addition the housing crossmember, which is constructed as a closed profile, takes over protective functions for torsion bars and setting device.
With regard to the closed profile different configurations are conceivable. Preferably the closed profile has a circular, rectangular or triangular cross section.
According to a further particularly advantageous configuration of the invention multiple moldings each having a horizontally oriented bore, are formed on the housing beam. Correspondingly the auxiliary frame is provided with correspondingly oriented horizontally oriented bores so that the housing beam can be fastened via a horizontally oriented threaded connection on the auxiliary frame. The horizontal threaded connection is particularly advantageous with regard to the smaller required mounting space.
BRIEF DESCRIPTION OF THE DRAWING
Further advantages features and applications of the present invention become apparent for then following description in connection with the exemplary embodiment shown in the drawing.
In the description, in the claims and in the drawing the terms and assigned reference numerals listed in the list below are used.
In the drawing it is shown in:
FIG. 1 an adjustable wheel suspension for the wheels of an axle of a motor vehicle according tot the state of the art, and
FIG. 2 an adjustable wheel suspension constructed according to the invention.
 DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
In the following description and in the figures same components and parts are designated with the same reference numerals insofar as no further differentiation is required or useful to avoid repetition.
FIG. 1 shows an adjustable wheel suspension overall designated with the reference numeral 10 for the wheels 12, 14 of an axle of a motor vehicle.
As can be seen from FIG. 1 each wheel 12, 14 is operatively connected to a torsion rod 20, 22 via a wheel guiding element 16, 18. Further wheel guiding elements are not shown for reasons of clarity, the two torsion rods 20, 22 are oriented in transverse direction FQ of the vehicle so as to be partially aligned with each other.
Each torsion rod 16, 18 is assigned a setting device 24, 26. The torques required for the adjustment of the torsion rods 16,18 are provided by the setting device 24 or 26.
The setting devices 24, 26 are directly fastened on an auxiliary frame 28, here only shown schematically. In order to be able to absorb the occurring forces and torques, the auxiliary frame 28 has to be reinforced in this region. This increases weight and costs.
This is where the invention comes into play.
As shown in FIG. 2 a housing crossmember 30 is arranged in the wheel suspension 10 according to the invention between the setting devices 24, 26.
The housing crossmember 30 connects the housing of the setting devices 24, 26. The housing crossmember 30 absorbs the acting forces and torques, i.e., the forces and torques acting on the interface setting device 24 or 26 and auxiliary frame 28 are strongly reduced.
As a consequence the reinforcement of the auxiliary frame, which in the state of the art is required in this region, is no longer required so that a lighter configuration of the auxiliary frame is possible.
As further shown in FIG. 2 the aligned regions of the torsion rods 20, 22 and with this also the housing beam 30 are oriented in transverse direction FQ of the vehicle. The housing beam 30 is configured and dimensioned so that the housing beam 30 additionally takes over the function of a normally required auxiliary frame transverse member. As a consequence the auxiliary frame 28 is constructed without a front auxiliary frame transverse member, which leads to a further weight reduction.

Claims (3)

The invention claimed is:
1. An adjustable wheel suspension for the wheels of an axle of a motor vehicle, comprising:
adjustable torsion bars respectively assigned to the wheels in one to one correspondence and operatively connected to the wheels via a respective wheel guiding element, said torsion bars being partially aligned with each other and oriented in transverse direction of the vehicle;
a setting device respectively assigned to each of the torsion bars, each of the torsion bars being respectively supported via the setting device on an auxiliary frame of the motor vehicle; and
a housing crossmember connecting the setting device of one of the torsion bars and the setting device of another one of the torsion bars with each other, said housing crossmember being configured and dimensioned so as to provide sufficient stability to enable construction of the auxiliary frame without a transverse member.
2. The adjustable wheel suspension of claim 1, wherein the housing crossmember is configured as a closed profile.
3. The adjustable wheel suspension of claim 2, wherein the closed profile has a circular, rectangular or triangular cross section.
US14/407,815 2012-06-15 2013-05-24 Adjustable wheel suspension for the wheels of an axle of a motor vehicle Active US9321323B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102012011918 2012-06-15
DE102012011918A DE102012011918A1 (en) 2012-06-15 2012-06-15 Adjustable wheel suspension for the wheels of an axle of a motor vehicle
DE102012011918.6 2012-06-15
PCT/EP2013/001533 WO2013185879A1 (en) 2012-06-15 2013-05-24 Adjustable wheel suspension for the wheels of an axle of a motor vehicle

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US20150165862A1 US20150165862A1 (en) 2015-06-18
US9321323B2 true US9321323B2 (en) 2016-04-26

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US (1) US9321323B2 (en)
EP (1) EP2861440B1 (en)
JP (1) JP6022047B2 (en)
KR (1) KR101933265B1 (en)
CN (1) CN104364101B (en)
DE (1) DE102012011918A1 (en)
WO (1) WO2013185879A1 (en)

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CN104364101B (en) 2016-11-09
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DE102012011918A1 (en) 2013-12-19
KR101933265B1 (en) 2018-12-27
CN104364101A (en) 2015-02-18
EP2861440B1 (en) 2016-07-13
EP2861440A1 (en) 2015-04-22
JP2015523266A (en) 2015-08-13
WO2013185879A1 (en) 2013-12-19
US20150165862A1 (en) 2015-06-18

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